Download the exe from here:
Install it using defaults.
Once the install is done, Go to here:
C:\Program Files (x86)\teraterm
Paste the 2 files attached below to the above folder. If it asks, replace them. Then open the program.
This will give you the following:
- CTRL+A select the window
- CTRL+C copy the window
- CTRL+Z clear the buffer/window
- 20000 lines of recording
To check this, go to Setup>Window and a new window will popup. Make sure Scroll Buffer is checked and has "20000" displayed in it.